5 243 281 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 2 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
12822001026744857	17	53.5	old
226664280530003829951476180911	30	97.5	2025-04-30 07:29:14

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-20	kkmrkkblmbrbk	7BAB3C340ED7AC5E	1	0	1	3
Verified (Factored)	2018-05-30	Battlemaxx	7BAB3C340ED7AC5E	1	2393267	1	3
Verified	2025-05-06	mrh	0ACBF2007E4E6590	2	4873388	5	3

P-1 factors

Date	Factor	B1	B2
2025-04-30	226664280530003829951476180911	3500000	9869749890

History

Date	User	Type	Result
2025-05-06	flaq	CERT	PRP Certification Proof certified good
2025-05-06	mrh	C-PRP	M5243281/12822001026744857/226664280530003829951476180911 : 0ACBF2007E4E6590 PRP proof power = 7 PRP: Verified Proof certified good
2025-04-30	Sid & Andy	F-PM1	Factor: 226664280530003829951476180911 / (P-1, B1=3500000, B2=9869749890)
2025-03-18	Sid & Andy	NF	no factor from 2^68 to 2^70
2023-05-11	This -Anonymous-	NF-PM1	B1=50000, B2=1000000
2018-05-30	Battlemaxx	C-PRP	M5243281/12822001026744857 : 7BAB3C340ED7AC5E PRP: Verified (Factored) PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M5243281/12822001026744857 : 7BAB3C340ED7AC5E PRP: Verified (Factored) PRP without proof (not generated)